Average weekly hours of production/nonsupervisory workers, by industry, 1964 and 1999 Industry 1964 1999 Services 36.1 32.6 Finance, insurance, and real estate 37.3 36.2 Retail trade 37.0 29.0 Wholesale trade 40.7 38.3 Transportation and public utilities 41.1 38.7 Manufacturing 40.7 41.7 Construction 37.2 39.1 Mining 41.9 43.8